Direct-Acting and Reverse-Acting
(My comments)
The terms "direct" and "reverse" are frequently used when discussing control valves, positioners,
and controllers while writing the control narratives for the complex loops, though the definitions of
direct a

BABYLONIAN
ENGINEERS
MAJOR ACHIEVEMENTS OF THE BABYLONIAN
ENGINEERS DURING THE PERIOD 6000-3000
B.C.
ANCIENT BABYLON
Geographically, the empire of Babylon occupied the middle and
southern parts of Mesopotamia.
It was situated between the Tigris and Euph